Sectional bolt.



E. FONGEALLAZ. SEGTIONAL BOLT. APPLICATION IILED OCT. 23, 1908.

94:8, 5 5 9 Patented Feb. 8, 1910.

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EUGENE FONGEALLAZ, 0E NORWOOD, MASSACHUSETTS. ASSIGNOR OF FIFTY-ONE bNE- GEORGE R. UNDERWOOD, GEORGE TENNEY,

* H'UNDREDTHS T0 EDWARD C. WRIGHT, EUGENE M. WATERS, AND CHAU'NCEY P. FENTON, or BOSTON, MASSACHUSETTS.

SECTIONAL BQLTZ Patented Feb. 8, 1910.

Application filed October 23, 1908. Serial No. 459,257.

To all whom/it may concern: p

Be it known that -I, E GENE FONGEALLAZ, of Yorwood, in the county of Xorfolk and State of Massachusetts, have invented a new and useful Improvement in Sectional Bolts, of which the following is a specification.

My invention relates to bolts and particularly to sectional bolts for .use in structural iron work, bridges, ship building and the like where a simples and strong bolt is required. although it will be clear from the following description that my improved bolt is notlimited in this respect and can be used generally in situations where it is desired to securely bolt two or more things together.

.As is well known, the bolts carrying a screw-threaded nut now commonly usedwill in time become loose and the nut will be gradually loosened or worked oil the bolt by vibration of the structure in which the bolt-is inserted; .This defect is one which can be obviated by the use of my improved sectional bolt. Another disadvantage of using the common style of headed bolt is, when securing parts of large structures toether, if the two ends of the bolt hole he so ar apartthat one workman cannot reach around the structure to insert a bolt in the hole with one hand and, atthe same time, secure a nut 'upon the threaded end of the bolt with the other hand, it is necessary to employ two workmen to do the bolting one on to the expense and labor of construction. proved sectional bolt, this expense and trouble isavoided and one workman cando the work as quickly and efliciently as has heretofore been done by two.

The object of my invention a sectional bolt of simple, inexpensive and strong construction which may be quickly applied and secured to a structure by a single wor an, operating wholly from one side of the structure, and to provide a bolt of this kind which will be so constructed as to positively hold the nut against working loose on the bolt through vibration.

My improved sectional bolt consists of a plurality of bars so shaped as to produce a cylindrical shank when assembled side by side. The bars are threaded at their outer ends to receive a nut and at their inner ends they diverge so as to leave a space between is to provide With the use of my 1111- said inner ends, and

Fig. l. The nut C is then thus provide a tapered head to engage the structure where it surrounds the inner end of the bolt hole. In the preferred form of my invention a strut is also provided for holding the inner separated extremities of the bars apart and locking them against rotary movement when assembled. This strut is provided by bendmg inwardly'the inner end of one of the bars.

Referring to the accompanying drawings :Figure 1 shows the preferred form of my improved bolt in side elevation as it appears when in place in a structure; Fig. 2 is a section on line 2-2 of Fig. 1; Figs. 3 and at are two elevations of one of the half-round bolt sections; Figs. 5 and 6 are two elevations of the other half round bolt section; Fig. 7 is a section Fig. 8 shows another form of my invention; and Fig. 9 is a section on line 99 of Fig. 8.

'Having reference to the drawings A represents one of the bolt sections; B the other bolt section, and C the nut. The bolt sections A and B are half round bars (see Fig. 7) threaded at their outer ends as at a, b, so that when brought together as in Figs. 1 and 7 they make up a threaded bolt which is cylindrical, except at its inner end where the two bars A and B' are spread apart or diverge as at a" and b shaped head D having an interior space d. At its inner extremity the bar A is bent inwardly so as to provide a strut a which bears against the bar In applying my improved bolt the usual cylindrical bolt hole e is made in the structure E and then the bolt section A is inserted into bolt hole e with strut a in ad- 'vance until the strut a is well beyond the inner side of structure E. Then the bolt section B is inserted into bolt hole 6, alongside of section A, its inner extremity overlapping and engaging strut a as shown in applied and threaded end As the head D tightened upon the outer screw of the bolt thus assembled.

- is forcibly drawn partly into the inner" end.

of bolt hole 6 by the tightening of the nut the structure andthe bolt score each other which together with the compressing of head D as the bolt is drawn outwardly by the nut G, acts not only to prevent rotation on line 77 of Fig. 1;

to form a wedgeof the bolt with the nut but also to establish a constant back pressure or pull by head '1),

which fprevents the nut from being. jarred loosega erward by vibrations of structure E;

In Figs. 8 and 9 I have shown another form of my invention wherein the shank portion of the; bar A is provided with ears or lugs 1, adapted to embrace the shank portion of theother bar B, so as to ,holdthe two bars against lateral displacement. The

, bar B, where it is engaged by the lugs f, is

but so far as I know I am the first to produce. abolt of this'class which can be irr-- serted in a cylindrical bolt. hole entirely from one side of the structure which is being bolted together. So long as the extent of divergence of the inner ends of bolt sec-- tions A and B is properly proportioned with relation to the length ofthe bolt hole, and so long asthe length of strut a is proportioned so that the distance between the a two dot-and-dash lines m-w and y-3 1s,not greater than the "diameter of the bolt hole, then my improved ,bolt may be made for bolt'hols of any desired length which is a crates capacity also wholly new in a bolt of this class. j What I claim is 1. An improved sectional bolt comprising two bars, said bars being adapted at their outer ends to "receive a nut 'or the like and being spread apart at their inner ends to form a head, with the extremity of one of said bars bent inwardly toward the inner end of the other to provide a separating strut.

2. An improved sectional bolt comprising two bars each half round inicross-section,

said bars being adapted at their outer ends to receive a nut or the like, and being spread apart at their inner ends to form a beveled head, and a strut for holding the inner ends of said bars apart and preventing their ro-- tation with respect to each other.

3. An improved sectional bolt comprising two bars adapted to form the. shank and head of the bolt when assembled, one or said bars having its shank portion bent outwardly and inwardly forming a strut approximately of the same length as the diameter of the'bolt hole into which it is to be inserted, and the other-of said barshaving its shank bent outwardly, whereby when. the

two bars are assembled within the bolt hole they cannot be withdrawn either before or after the nut or other .fastening rneans 15 secured to their outer ends.

EUGENE FONGEALLAZ]. v

Witnesses:

FRANCES GoNNoR, RALPH HAYCOCK. 

